JP3191692B2 - Mobile terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a portable terminal device comprising a portable terminal such as a cordless telephone and a charging stand for charging a battery of the portable terminal.

[0002]

2. Description of the Related Art A rechargeable secondary battery is generally used as a power supply for a portable terminal such as a cordless telephone.
When the portable terminal is not in use, it is placed on a charging stand and the charging stand charges the secondary battery. By the way, such a portable terminal has an outside line button so that an outside line can be accessed, and also has an outside line lamp for displaying a use state of the outside line. Then, when the terminal is not in use, the terminal is not used, for example, when an outgoing call is made or when the terminal receives a call, without displaying an external line lamp or the like to prevent battery consumption. The display is performed only when the message is displayed.

[0003]

As described above, in the conventional portable terminal, since the lamp display of the outside line or the like is performed only when the terminal is in use, the terminal is picked up from the charging stand and, for example, the outside line is transmitted. It is not possible to identify whether the external line to be accessed is being used by another terminal. For this reason, there has been a problem that another terminal accidentally presses an outside line button during a call, or another terminal presses an outside line button on hold to respond to a hold. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problem by displaying a use state based on the use of an outside line of another terminal even when the portable terminal is not used, such as when charging.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a charging stand provided with a power supply terminal for outputting the power of a power supply section of the charging stand, and a portable terminal connected to the power supply terminal. Power supply terminal is provided, and either one of the power supply unit and the secondary battery is supplied as power to the portable terminal according to the presence or absence of a voltage at the power supply terminal. Therefore, at the time of charging, the power of the charging stand can be supplied to the portable terminal, and as a result, the portable terminal can display an outside line lamp or the like based on the use of the outside line of another terminal. Further, the mobile terminal detects the presence or absence of a voltage at a power supply terminal and supplies one of the power source and the secondary battery as power to the mobile terminal. Therefore, the portable terminal can accurately detect its own charge / non-charge and switch to the power supply from the charging stand or the power supply from the secondary battery.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 3 is a block diagram showing a configuration of a key telephone device accommodating the portable terminal device of the present invention. As is well known, the key telephone device has a main device 1 for accommodating a plurality of external lines 21 to 2n and a main device 1 as shown in FIG. And a plurality of button telephones 3 connected by wire. In this key telephone device, a main unit 4 is also connected to the main unit 1 by wire in addition to the key telephone 3, and the main unit 4 is wirelessly connected to a digital cordless handset 6 which is a portable terminal. I have.

Here, when a calling operation is performed by the keyboard 35 in any of the button telephones, the control unit 33
Is transmitted from the transmission circuit 32 to the main device 1 and received by the CPU 14. In this case, CP
U14 controls the corresponding external line interface to capture the external line, sends a dial signal corresponding to the operation data to the captured external line, and controls the communication path switch 12 to connect the telephone line between the relevant external line and the key telephone. I do. As a result, the call of the other party is made, and the other party answers, and a call is made. At the time of such an outside line communication, the CPU 14 transmits the external line lamp lighting instruction data to not only the telephone but also other key telephones via the telephone interface. Thereby, the display circuit 34 of each key telephone is set.
The corresponding outside line lamp lights up.

[0007] Such external line lamp lighting data is transmitted to the base unit 4.
The master unit 4 transmits such display data to the digital cordless handset 6 as a wireless signal via the antenna AT. When receiving the display data, the digital cordless handset 6 displays it on the display unit. The display data at the time of the outside line call of such a key telephone is transmitted to the digital cordless handset 6 side not only when the event occurs (at the start of the outside line call) but also when the call is continued after the event occurrence. The digital cordless handset 6 displays such data each time it receives such display data. Note that, even when the digital cordless handset 6 transmits an outside line, the operation data is wirelessly transmitted from the digital cordless handset 6 to the base unit 4, and when the operation data is received, the base unit 4 transmits the operation data to the main device 1. In this case, CPU1
No. 4 performs the same external line transmission processing as when transmitting from the key telephone.

FIG. 4 is a block diagram showing the configuration of the base unit 4. The base unit 4 includes a radio transmitting / receiving unit 41 for performing radio communication with the digital cordless handset 6, a modem demodulator 42 for demodulating a received signal, and a designation unit. Channel codecs 43 and 44 for inputting / outputting the data of the time slot, an audio codec 45 for performing digital / analog conversion and analog / digital conversion of the audio signal, a modem modulator 46 for modulating the input data, a wireless processing CPU 47, An ID ROM 48 for storing the identification code of the machine 4, a line processing CPU 49 for controlling transmission and reception of data with the main device 1, and a transmission circuit 50 for performing data transmission with the main device 1 are provided.

The data transmitted from the main unit 1 is received by the line processing CPU 49 via the transmission circuit 50 and transmitted to the wireless processing CPU 47. Then, the wireless processing CPU 47 transmits this data to the channel codec 4.
4, the data is wirelessly transmitted to the digital cordless handset 6 through the route from the modem modulator 46 to the wireless transmission / reception unit 41. Further, data from the digital cordless handset 6 is transmitted to the wireless processing CPU 47 through the route of the wireless transmission / reception unit 41 → the modem modulator 42 → the channel codec 43. The wireless processing CPU 47 sends this data to the line processing CPU 49 so that the transmission circuit 50
Is transmitted to the main device 1 via

The audio signal from the main unit 1 is input to an audio codec 45, where it is converted into a digital signal and converted into a channel codec 44 → a modem modulator 46 →
The data is transmitted to the digital cordless handset 6 via the path of the wireless transmission / reception unit 41. Also, the audio signal from the digital cordless handset 6 is transmitted through the radio transmission / reception unit 41 → the modem modulator 42 → the channel codec 43 to the audio codec 45.
To the main unit 1
Sent to the side. As described above, the master unit 4 transmits data and audio signals from the digital cordless handset 6 to the main device 1 and transmits data and audio signals from the main device 1 to the digital cordless handset 6. . Here, the data from the main device 1 also includes the display data of the external line lamp that is periodically transmitted from the main device 1 when the key telephone is performing an external call or holding an external line as described above. The master unit 4 transmits the display data to the digital cordless handset 6, and the digital cordless handset 6 displays the display data every time it receives the periodically transmitted display data.

FIG. 1 is a block diagram showing a configuration of the digital cordless handset 6 and a charging stand 8 for charging a secondary battery, which is a power source of the digital cordless handset 6, which will be described later.
The digital cordless handset 6 includes a wireless transmission / reception unit 61 for performing wireless communication with the base unit 4 as a base station, a modem demodulator 62 for demodulating a received signal, a channel codec 63 for inputting / outputting data of a designated time slot, 64, an audio codec 65 for performing digital / analog conversion and analog / digital conversion of an audio signal, a modem modulator 66 for modulating input data, a CPU 67, and the like.

The CPU 67 has a display section 68 such as a lamp,
Keyboard 69, ID for storing identification code of this slave unit
The ROM 70 and the buzzer 71 are connected, and the audio codec 65 is connected to a receiver 72 and a microphone 73. The digital cordless handset 6 is provided with a chargeable secondary battery 74 as a power supply, and the output of the secondary battery 74 is supplied to the power supply circuit 7 via a power supply switching unit 75.
6, the power supply voltage V is supplied from the power supply circuit 76 to each unit of the slave unit 6. In addition, the digital cordless handset 6 has a charging terminal 77 for charging the secondary battery 74 and a power supply terminal 78 for inputting the operation power of the digital cordless handset 6 when charging the secondary battery 74. Is provided.

On the other hand, a charging unit 8 receives a commercial power supply 10 through an AC adapter 9 and removes noise components by a filter unit 81, a step-down chopper unit 82 that steps down the output of the filter unit 81 and converts the output to a direct current, A current control unit 83 for controlling the output current, a switch unit 84 for switching the current,
A voltage control unit 85 for controlling the output voltage value, a control circuit 86 for controlling each of the above units, and the like are provided. The charging stand 8 has a charging terminal 87 for applying the output voltage of the voltage control unit 85 to the secondary battery 74 of the digital cordless handset 6 for charging, and a step-down chopper unit for charging the digital cordless handset 6. A power supply terminal 88 for providing the output voltage of 82 to the slave unit 6 as an operation power supply is provided.

When such a portable terminal device transmits a call to the other party using the digital cordless handset 6, the handset 6 is first picked up from the charging stand 8. Then, the power switching unit 75
The power from the secondary battery 74 via the power supply circuit 76 is supplied to each unit of the slave unit 6. Next, when an outside line key and a dial key on the keyboard 69 are operated, the CPU 67 detects the operation and sends the operation data and its own identification code to the channel codec 64. As a result, these data are wirelessly transmitted as data of the control channel to the base unit 4 via the modem modulator 66 and the wireless transmission / reception unit 61, so that the other party is called and the other party responds via the communication channel. A call is made.

During a call, its own voice via the microphone 73 is transmitted to the master unit 4 through the route of the voice codec 65 → the channel codec 64 → the modem modulator 66 → the radio transmitting / receiving unit 61 → the antenna AT. Further, the voice of the other party via the base unit 4 is transmitted from the antenna AT → the wireless transmitting / receiving unit 61 →
The signal is output to the receiver 72 through the route of the modem demodulator 62 → the channel codec 63 → the voice codec 65. At this time, the external line lamp in the display unit 68 is displayed in a lighting state indicating that the terminal is in use. Also, even if no call is being made by the digital cordless handset 6, if the key telephone sets an outside line call or outside line hold, the display data of the outside line lamp is periodically transmitted from the base unit 4 as described above. When the digital cordless handset 6 receives the display data, the digital cordless handset 6 displays an outside line lamp in the display unit 68.

On the other hand, an incoming signal from the other party via the base unit 4 is transmitted from the antenna AT → the radio transmitting / receiving unit 61 → the modem demodulator 6
It is transmitted to the CPU 67 through the route of 2 → channel codec 63. In this case, when the CPU 67 confirms that the identification code included in the incoming signal matches its own identification code, the CPU 67 causes the buzzer 71 to ring and the external line lamp in the display unit 68 to blink. Then, when the outside line key in the keyboard 69 is pressed, data indicating an incoming call response is transmitted to the channel codec 64 together with its own identification code. As a result, these data are wirelessly transmitted to the master unit 4 as control channel data via the modem modulator 66 and the wireless transmission / reception unit 61, so that a call is made with the other party via the communication channel.

Then, after the end of the call, when the slave unit 6 is placed on the charging stand 8 for charging the secondary battery 74 of the digital cordless slave unit 6, the charging terminal 77 and the power terminal 78 of the slave unit 6 become Each is connected to the charging terminal 87 and the power supply terminal 88 of the charging stand 8. As a result, power is supplied to the secondary battery 74 from the voltage control unit 85 of the charging stand 8 via the charging terminals 87 and 77, and charging is started. In this case, the CPU 67
When the power supply voltage supplied from the step-down chopper section 82 of the charging stand 8 via the power supply terminal 78 is detected, the power supply switching section 75 is switched to control the power supply instead of the power supply from the secondary battery 74 which has been supplied so far. The power supply voltage from the step-down chopper section 82 via the terminal 78 is supplied to the power supply circuit 76 and supplied to each section of the slave unit 6. A capacitor (not shown) is provided at the input stage of the power supply circuit 76, and the slave unit 6
Care should be taken not to interrupt the power supplied to each part.

As described above, the charging stand 8 is connected via the charging terminal 77.
During charging of the secondary battery 74 from the power supply, power from the charging stand 8 via the power supply terminal 78 is supplied to each section of the digital cordless handset 6. As a result, the digital cordless cordless handset 6 can secure a power supply capable of displaying a lamp on the display unit 68 even during charging. Therefore, even if the digital cordless handset 6 is being charged and is not in use, the digital cordless handset 6 is periodically sent from the base unit 4 by the key telephone set making an outside line call or holding an outside line. By receiving the display data, the external lamp display on the display unit 68 can be performed.

FIG. 2 is a flowchart showing the operation of the digital cordless handset 6 performed by the CPU 67 when charging. According to this flowchart, the operation of the main part of the present invention will be described in more detail. First, in step S1, it is determined whether the voltage of the power supply terminal 78 is at the "H" level. Here, if the voltage of the power supply terminal 78 is at the “H” level, the child device 6 is placed on the charging stand 8 and determines that the secondary battery 74 is being charged. Is increased by one in a chattering counter provided inside to absorb the chattering. Next, in step S3, it is determined whether or not the value of the counter has reached a set value. If the value has not reached the set value, an internally provided timer for measuring a predetermined time is started in step S4, and the timer is timed out. Is determined in step S5. When the timer expires, the process returns to step S1 to again determine the "H" level of the power supply terminal. If the "H" level, the counter is incremented by one again.

In this manner, the chattering counter is incremented by one while the power supply terminal 78 is at the "H" level. Then, when this counter value reaches the set value, step S
If the determination of 3 is "Y", the chattering counter is cleared in step S6. Subsequently, in step S7, it is determined whether or not the battery is operating, that is, whether or not the power from the secondary battery 74 is being supplied to each unit of the slave unit 6.

Here, the power supply from the secondary battery 74 is
In this case, the CPU 67 controls the power switching unit 75 in step S8 to switch the power supply from the secondary battery 74 to the power supply from the charging stand 8 via the power terminal 78. Thereafter, the process proceeds to step S4 to start the timer, and after the timer expires, the process returns to step S1. In this way, during charging of the secondary battery 74 from the charging stand 8, power from the charging stand 8 is supplied to each unit of the slave unit 6 via the power supply terminal 78. If power has already been supplied from the charging stand 8 at the time of determination in step S7, the process proceeds to step S4 without performing power supply switching control, and the timer is started and the timer is timed up. Thereafter, the process returns to step S1.

Next, when the digital cordless cordless handset 6 is picked up from the charging stand 8, each terminal is disconnected, so that the voltage level of the power supply terminal 78 becomes "L" level, so that the judgment in step S1 is "N". Becomes In this case, immediately after clearing the chattering counter in step S9,
In step S10, it is determined whether or not the power from the secondary battery 74 is being supplied to each section of the slave unit 6. If "N", the CPU 67 controls the power switching section 75 in step S11, and The power supply from the charging stand 8 via the power supply 78 is switched to the power supply from the secondary battery 74, and the process proceeds to step S4. At this time, if the power is already supplied from the secondary battery 74, the process proceeds to step S4 to start a timer, and after the timer expires, the process returns to step S1.

As described above, during charging of the secondary battery 74 from the charging stand 8, power from the charging stand 8 via the power supply terminal 78 is supplied to each unit of the slave unit 6. If it is in use, the data can be received and the external lamp in the display unit 68 can be displayed as being in use, or another lamp can be displayed. Therefore, when the slave unit 6 is picked up from the charging stand 8 and, for example, an outside line is transmitted, another terminal accesses the outside line during a call, or another terminal accesses the outside line on hold and responds to the hold. Problems can be avoided beforehand.

While the digital cordless cordless handset 6 is being charged, the lamp in the display section 68 may be displayed by the charging current from the charging stand 8 to the secondary battery 74. There is a problem that the battery cannot be charged if the current consumption of the terminal changes and the current consumption becomes larger than the charging current. For this reason, when the value of the charging current is increased, there is a problem that the secondary battery 74 is deteriorated or heated. Also, the magnitude of the charging current is
It is conceivable to change the value according to non-lighting, but the control becomes complicated and not practical. For this reason, in the present invention, a power supply terminal 78 separate from the charging terminal 77 is provided, and when the secondary battery 74 is charged, power from the charging stand 8 is supplied to each section of the slave unit 6 via the power supply terminal 78. Is what you do.

In this embodiment, the power supply to the digital cordless handset 6 is switched by the switching control of the CPU 67 in accordance with the charging / non-charging of the secondary battery 74. Can be switched. That is, a detection circuit for detecting the voltage level of the power supply terminal 78 is provided in the digital cordless handset 6 or the charging stand 8, and the power supply switching unit 75
May be performed.

In this embodiment, an example of a digital cordless handset as a digital radio telephone has been described. However, the present invention can be applied to an analog cordless telephone. That is, in the case of an analog cordless telephone, since the modem demodulator 62, the modem modulator 66, the channel codecs 63 and 64, and the voice codec 65 are removed from the digital cordless handset 6, the present invention is similarly applied. Applicable. When the slave unit is an analog cordless telephone, the configuration of the master unit is also the same as that of the modem demodulator 4.
2, modem modulator 46, channel codec 43, 4
4 and the voice codec 45 are removed.

[0027]

As described above, according to the present invention, the charging stand is provided with the power supply terminal for outputting the power of the power supply unit of the charging stand, and the portable terminal is provided with the power supply terminal connected to the power supply terminal. According to the power supply terminal, one of the power supply unit and the secondary battery is supplied as power to the mobile terminal according to the presence or absence of the voltage of the power supply terminal. Therefore, the portable terminal can display an outside line lamp based on the use of the outside line of another terminal. As a result, when the mobile terminal is picked up from the charging stand and an outgoing call is made, for example, another terminal accesses the outside line during a call, or another terminal accesses the outside line on hold and responds to the hold. Problems can be avoided. Also, the mobile terminal detects whether there is a voltage at the power supply terminal and supplies one of the power source and the secondary battery as power to the mobile terminal. The power can be accurately detected and switched to the power supply from the charging stand or the power supply from the secondary battery.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a portable terminal device according to the present invention.

FIG. 2 is a flowchart showing an operation of a main part of the apparatus.

FIG. 3 is a block diagram showing a configuration of a key telephone device accommodating a portable terminal device.

FIG. 4 is a block diagram illustrating a configuration of a base unit to which the mobile terminal device is wirelessly connected.

[Explanation of symbols]

6 Digital cordless handset, 8 Charger, 67 CP
U, 68: display unit, 74: battery, 75: power supply switching unit, 7
6: power supply circuit, 77, 87: charging terminal, 78, 88: power supply terminal, 82: step-down chopper section, 85: voltage control section.

Claims (2)

(57) [Claims] 1. A portable terminal having a rechargeable secondary battery as a power supply, and a charging stand having a power supply unit and charging the secondary battery of the portable terminal from the power supply via a charging terminal. In the portable terminal device, a power supply terminal for outputting power of the power supply unit is provided on the charging stand, and a power supply terminal connected to the power supply terminal is provided on the mobile terminal. And a means for supplying one of the power source and the secondary battery as power to the mobile terminal. 2. The mobile terminal according to claim 1, wherein the mobile terminal detects the presence or absence of a voltage at the power supply terminal, and supplies one of the power source and the secondary battery as power to the mobile terminal. A portable terminal device characterized by the above-mentioned.